Fu Debin, Wang Yang, Liu Shanting, Yang Xiaofei, Song Jie, Ma Xuexue, Li Ning, Liu Hui, Liu Sheng Hua
State Key Laboratory of Green Pesticide, Central China Normal University, Wuhan 430079, PR China.
State Key Laboratory of Green Pesticide, Central China Normal University, Wuhan 430079, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2025 Apr 5;330:125719. doi: 10.1016/j.saa.2025.125719. Epub 2025 Jan 7.
The construction of helical structures through self-assembly and the exploration of their formation mechanisms not only amplify chiroptical properties but also provide profound insights into the structures and functions of natural helices. In this study, we developed a chiral Au(I) system based on BINAP and alkynyl ligands. The modification of the length or number of alkyl chains at the terminal positions of the alkynyl ligands significantly impacted the self-assembly behavior of the complexes. Complexes (S)/(R)-2, (S)/(R)-3, (S)/(R)-5, and (S)/(R)-6 demonstrated aggregation-induced circularly polarized luminescence (AICPL). Notably, complexes (S)-6 and (R)-6 were capable of self-assembling into highly ordered helical aggregates, resulting in amplified g values reaching an order of magnitude of 10. The unique double-helix stacking observed in the crystal structure of (R)-6 provided a plausible explanation for the formation of such helical aggregates. This research offers a strategy for achieving amplified CPL through artificial helices, providing new insights and guidance for the development of Au(I) complexes with CPL activity.
